start-scroll
wayland/ssd1306-oled-i2c/start-scroll
Activate scroll for all or part of the display. To scroll whole display set FIRST to 00h and LAST to 0Fh.
start-scroll
@/start-scroll
Activate scroll for all or part of the display. To scroll whole display set FIRST to 00h and LAST to 0Fh.
DEV@/ssd1306-oled-i2c-device
An SSD1306 OLED device.
FIRSTbyte
First row
LASTbyte
Last row
DIRbyte
Direction. Options:
00h = left-handed scroll;
01h = right-handed scroll;
02h = diagonal scroll left;
03h = diagonal scroll right.
UPDpulse
Update. Trigger start.
DONEpulse
Pulses on completion.
C++ implementation
#pragma XOD evaluate_on_pin disable
#pragma XOD evaluate_on_pin enable input_UPD
struct State {
};
{{ GENERATED_CODE }}
void evaluate(Context ctx) {
// The node responds only if there is an input pulse
if (!isInputDirty<input_UPD>(ctx))
return;
// Get a pointer to the `Adafruit_SSD1306` class instance
auto display = getValue<input_DEV>(ctx);
auto first = getValue<input_FIRST>(ctx);
auto last = getValue<input_LAST>(ctx);
auto direction = getValue<input_DIR>(ctx);
switch (direction) {
case 0:
display->startscrollleft(first, last);
break;
case 1:
display->startscrollright(first, last);
break;
case 2:
display->startscrolldiagleft(first, last);
break;
case 3:
display->startscrolldiagright(first, last);
break;
}
emitValue<output_DONE>(ctx, 1);
}